Re: moms condition
It sounds very much like mini strokes.
I'm happy for you that she is 'behaving' well - and I hope it continues. You may have a good case against the NH if they threw her out for no reason other than money. I wonder if any of the aides who confided in you that she was not worse behaved than all the other patients would say that 'on record' in front of a lawyer or a judge?
Perhaps even the suggestion that the NH did the wrong thing (legally speaking) might result in some positive changes in that place - maybe you should consider a legal case.
Not that you have time or energy to do anything but care for your Mom right now. Are you still trying to find a better placement for her?
Those small strokes that often cause behavior changes don't always show up on hospital tests, they are so small they may only be causing a very small amount of bleeding in the brain, just enough to cause the shuffling, the slurring, etc. I find that hospital tests hardly ever show anything helpful in dementia cases - mostly they are not even looking for anything but tumors, aneurisms etc. They seem to be intersted in telling you what it is NOT, 'ruling out' as they call it - and once everythng else is ruled out, it's Alzheimers.
Good luck. Keep on getting enough sleep! Don't worry. (Yeah, right!)